/**
 * Copyright 2022 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MINDSPORE_CCSRC_BACKEND_OPTIMIZER_GPU_BIAS_DROPOUT_ADD_FUSION_H_
#define MINDSPORE_CCSRC_BACKEND_OPTIMIZER_GPU_BIAS_DROPOUT_ADD_FUSION_H_

#include <memory>
#include "include/backend/optimizer/optimizer.h"

namespace mindspore {
namespace opt {
// Add(residual, GetItem(Dropout(Add(x, bias)), 0)) -> BiasDropoutAdd(x, bias, residual)
class BiasDropoutAddFusion : public PatternProcessPass {
 public:
  explicit BiasDropoutAddFusion(bool multigraph = true)
      : PatternProcessPass("bias_dropout_add", multigraph),
        x_(std::make_shared<Var>()),
        bias_(std::make_shared<Var>()),
        index_(std::make_shared<Var>()),
        residual_(std::make_shared<Var>()) {}
  ~BiasDropoutAddFusion() override = default;
  const BaseRef DefinePattern() const override;
  const AnfNodePtr Process(const FuncGraphPtr &, const AnfNodePtr &, const EquivPtr &) const override;

 private:
  VarPtr x_;
  VarPtr bias_;
  VarPtr index_;
  VarPtr residual_;
};
}  // namespace opt
}  // namespace mindspore
#endif  // MINDSPORE_CCSRC_BACKEND_OPTIMIZER_GPU_BIAS_DROPOUT_ADD_FUSION_H_
